{"id":3049,"date":"2025-03-18T09:09:40","date_gmt":"2025-03-18T01:09:40","guid":{"rendered":"https:\/\/www.shopvalves.com\/product\/spirax-sarco-apt10-4-5-automatic-pump-trap\/"},"modified":"2026-03-24T11:35:35","modified_gmt":"2026-03-24T03:35:35","slug":"spirax-sarco-apt10-4-5-automatic-pump-trap","status":"publish","type":"product","link":"https:\/\/www.shopvalves.com\/en\/product\/spirax-sarco-apt10-4-5-automatic-pump-trap\/","title":{"rendered":"Spirax Sarco APT10-4.5 Automatic Trap Pumps"},"content":{"rendered":"

Spirax Sarco APT10-4.5 automatic trap pump design pressure PN10, threaded connection. Depending on the condition of the piping, it can automatically trap or pump water. This steam-powered unit removes condensate from heating equipment and processes under all operating conditions, even vacuum. The standard APT 10-4.5 is supplied with a blue finish and can be ENP nickel plated if required.<\/p>\n

Available Models<\/h3>\n\n\n\n\n\n
Available types<\/th>\nSKU<\/th>\n<\/tr>\n<\/thead>\n
apt10-4.5 3\/4\" condensate conn, 1\/2\" motive steam conn<\/td>\n6120100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

design standard<\/h3>\n

The housing is designed to meet A.D. Merkblatter\/ASME VIII standards.<\/p>\n

material (that sth is made of)<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nPart<\/th>\nmaterial (that sth is made of)<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\npump cover<\/td>\nDuctile Iron EN JS 1025 ASTM A395<\/td>\n<\/tr>\n
2<\/td>\nPump cover gasket<\/td>\nsynthetic fiber<\/td>\n<\/tr>\n
3<\/td>\npump body<\/td>\nDuctile Iron EN JS 1025 ASTM A395<\/td>\n<\/tr>\n
4<\/td>\nPump cover bolts<\/td>\nStainless steel BS EN ISO 3506 Gr.A2-70<\/td>\n<\/tr>\n
5<\/td>\nPump Valve Connecting Rods<\/td>\nStainless steel BS 1449 304 S15<\/td>\n<\/tr>\n
6<\/td>\nfloat<\/td>\nStainless steel BS 1449 304 S16<\/td>\n<\/tr>\n
7<\/td>\na pin<\/td>\nStainless steel BS 970 431 S29 ASTM A276 431<\/td>\n<\/tr>\n
8<\/td>\nspread litter in a cowshed, pigsty etc<\/td>\nStainless steel BS 1449 316<\/td>\n<\/tr>\n
9<\/td>\ntrap cover<\/td>\nStainless steel BS 970 431 S29 ASTM A276 431<\/td>\n<\/tr>\n
10<\/td>\nsphere<\/td>\nStainless Steel ASTM A276 440 B<\/td>\n<\/tr>\n
11<\/td>\nValve Seat ( Inlet Check Valve )<\/td>\nStainless steel AISI 420<\/td>\n<\/tr>\n
12<\/td>\nFlapper ( Inlet Check Valve )<\/td>\nStainless steel BS 3146 ANC 4B<\/td>\n<\/tr>\n
13<\/td>\nPump Mechanism Bracket<\/td>\nStainless steel BS 3146 ANC 4B<\/td>\n<\/tr>\n
14<\/td>\nSpring (Pump)<\/td>\nStainless steel BS 2056 302 S26 Gr.2<\/td>\n<\/tr>\n
15<\/td>\ncotter pin<\/td>\nStainless steel BS 1574<\/td>\n<\/tr>\n
16<\/td>\nExhaust Valve Seat<\/td>\nStainless steel BS 970 431 S29\/ ASTM A276 431<\/td>\n<\/tr>\n
17<\/td>\nSteam Inlet Valve and Seat Assembly<\/td>\nStainless steel ASTM A276 440B\/ BS 970 431 S29<\/td>\n<\/tr>\n
18<\/td>\nexhaust valve<\/td>\nStainless steel BS 3146 ANC 2<\/td>\n<\/tr>\n
19<\/td>\nSeat Gasket<\/td>\nStainless steel BS 1449 409 S19<\/td>\n<\/tr>\n
20<\/td>\nPump mechanism bolts<\/td>\nStainless steel BS EN ISO 3506 Gr.A2-70<\/td>\n<\/tr>\n
21<\/td>\nFloat Bolt<\/td>\nStainless steel BS EN ISO 3506 Gr.A2-70<\/td>\n<\/tr>\n
23<\/td>\nTrap Gaskets<\/td>\nStainless steel BS 1449 409 S19<\/td>\n<\/tr>\n
24<\/td>\npush rod or tappet (mechanics)<\/td>\nStainless steel BS 3146 ANC 2<\/td>\n<\/tr>\n
25<\/td>\nnameplate<\/td>\nStainless steel BS 1449 304 S16<\/td>\n<\/tr>\n
26<\/td>\nplug<\/td>\nStainless steel DIN 17440 1.4571<\/td>\n<\/tr>\n
27<\/td>\nPower Steam Filter<\/td>\nDuctile cast iron DIN 17440 1.4571<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Certificates and Standards<\/h3>\n

This product can be supplied with EN10204 3.1.B certificate. Note: If a certificate is required, please specify when ordering. This product complies with the European Pressure Equipment Directive 97\/23\/EC, ATEX Directive 94\/9\/EC and can be supplied and marked on request.<\/p>\n

Sizes and pipe connections<\/h3>\n\n\n\n\n\n\n
caliber<\/th>\ninlet<\/th>\nexportation<\/th>\nPower Inlet \/ Waste Vapor Port<\/th>\n<\/tr>\n<\/thead>\n
norm<\/td>\nDN20 (\u00be\")<\/td>\nDN20 (\u00be\")<\/td>\nDN15 (\u00bd\")<\/td>\n<\/tr>\n
connection method<\/td>\nBSP-BS21, NPT<\/td>\nBSP-BS21, NPT<\/td>\nBSP, NPT<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Calibrated Displacement: Consult Spirax Sarco for details. Trap pump selection is as follows: The following data is required for proper trap pump selection:<\/p>\n

    \n
  1. Available installation height (m): From the base of the trap pump to the centerline of the heat exchanger\/process condensate outlet. If the outlet is vertically downward, it is the height from the base of the trap pump to the outlet surface.<\/li>\n
  2. Power steam pressure (bar g) of the trap pump.<\/li>\n
  3. Total back pressure (bar g) in the condensate recovery system, see note below.<\/li>\n
  4. Working pressure of the heat exchanger at full load (bar g).<\/li>\n
  5. Maximum steam load of heat exchanger (kg\/h).<\/li>\n
  6. Minimum temperature of the medium to be heated ( oC).<\/li>\n
  7. Maximum control temperature ( oC) of the medium to be heated.<\/li>\n<\/ol>\n

    restrictive condition<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Pump body design conditions<\/th>\nPN10<\/th>\n<\/tr>\n<\/thead>\n
    Maximum power pressure<\/td>\n4.5 bar g<\/td>\n<\/tr>\n
    Maximum working pressure<\/td>\n4.5 bar g<\/td>\n<\/tr>\n
    Maximum back pressure<\/td>\n4.0 bar g<\/td>\n<\/tr>\n
    Maximum working temperature<\/td>\n155 o C<\/td>\n<\/tr>\n
    Minimum working temperature<\/td>\n-10 o C<\/td>\n<\/tr>\n
    Temperature limitation (ambient)<\/td>\n-10 o C - 200 o C<\/td>\n<\/tr>\n
    Design maximum cold hydraulic test pressure<\/td>\n15.0 bar g<\/td>\n<\/tr>\n
    Minimum mounting height (from pump base)<\/td>\n0.2 m<\/td>\n<\/tr>\n
    Recommended minimum mounting height (from pump base)<\/td>\n0.3 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n
    caliber<\/th>\nDN20 \u00d7 DN20<\/th>\n<\/tr>\n<\/thead>\n
    Pump displacement \/ per cycle<\/td>\n2.6 liters<\/td>\n<\/tr>\n
    prerequisite<\/td>\nMax. water evacuation 830 kg\/h, max. pumping 650 kg\/h at 1.0 m installation height, 4.5 bar g power pressure, 2.5 bar g total back pressure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Security information, installation and maintenance<\/h3>\n

    NOTE: The total head or back pressure BP (static head + return line pressure) must be less than the power pressure to achieve the rated discharge.
    \n[BP (back pressure) = (H \u00d7 0.0981) +\u00a7 + (P f)]
    \nHeight (H) m x 0.0981 + Return line pressure \u00a7bar g + Downstream piping friction pressure drop (Pf) bar. (Piping friction resistance can be ignored if the downstream piping is less than 100 m, the condensate piping is not a full-overflow pipe, and the effect of secondary vapors when the heat exchanger is at full capacity has been taken into account during piping sizing.)
    \nDetailed instructions are provided in the Installation and Maintenance Guide supplied with the product.<\/p>\n

    weights<\/h3>\n\n\n\n\n\n
    caliber<\/th>\nweights<\/th>\n<\/tr>\n<\/thead>\n
    DN20 \u00d7 DN20<\/td>\n14kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Product Description<\/h3>\n

    Spirax Sarco automatic trap pump APT10-4.5 with maximum steam working pressure up to 4.5 bar g. No electricity required. The pump body is constructed of ductile iron (GGG 40.3 or ASTM A395) with a swinging inlet check valve and a spherical outlet check valve. The internal trap mechanism is a stainless steel float connected to a built-in trap. The pump, trap and check valve mechanism are combined in the same pump body with no external seals or packings. Minimum mounting height 200mm (from pump base).<\/p>\n

    Ordering Instructions<\/h3>\n

    Example: 1-Automatic trap pump, model APT10-4.5, DN20 x DN20, threaded BSP connection, with threaded BSP power steam connection.<\/p>\n

    Spare Parts<\/h3>\n

    Spare parts are shown in solid lines, dashed lines indicate that they are not available as spare parts. Spare parts available<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    serial number<\/th>\nName of spare parts<\/th>\nSerial number of parts involved<\/th>\n<\/tr>\n<\/thead>\n
    A<\/td>\nPump cover gasket<\/td>\n2<\/td>\n<\/tr>\n
    B<\/td>\nImport check valve<\/td>\n2, 12<\/td>\n<\/tr>\n
    C<\/td>\nSprings and Actuators<\/td>\n2, 14, 24<\/td>\n<\/tr>\n
    D<\/td>\nfloat<\/td>\n2, 5, 6, 21<\/td>\n<\/tr>\n
    E<\/td>\nTrap and Outlet Check Valve Mechanisms<\/td>\n2, 7, 8, 9, 10, 22, 23<\/td>\n<\/tr>\n
    F<\/td>\nInlet\/Discharge Spool and Seat Assemblies<\/td>\n2, 16, 17, 18,19<\/td>\n<\/tr>\n
    G<\/td>\nPower Steam Filter (Fig12 ductile iron)<\/td>\n-<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    PLEASE NOTE: For customer convenience, spare parts will be supplied in complete sets to ensure that all necessary parts are available. For example, when ordering inlet\/outlet spools and seats, all cotter pins, gaskets, and shims that should be replaced will be supplied with the critical parts.
    \nOrdering Spare Parts: Order spare parts as described in the Available Spare Parts table, indicating the product caliber and model number. Example: 1 - Inlet\/outlet spool and seat assembly for Spirax Sarco DN20 x DN20 APT10-4.5 automatic trap pump.<\/p>\n

    \"Spirax<\/p>\n

    <\/p>\n

    \n

    Technical Data Download<\/h3>\n
    \nAPT10-45-IM-P612-32-US.pdf<\/a>
    TI-P612-28-Chinese.pdf<\/a> <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Spirax Sarco Spirax Sarco APT10-4.5 automatic trap pump design pressure PN10, threaded connection. Depending on the different conditions of the piping,...<\/p>","protected":false},"featured_media":5037,"template":"","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[24],"product_cat":[183,49],"product_tag":[],"class_list":{"0":"post-3049","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-spirax-sarco","7":"product_cat-mechanical-pumps","8":"product_cat-condensate-and-heat-recovery-systems","10":"first","11":"instock","12":"sale","13":"shipping-taxable","14":"purchasable","15":"product-type-variable","16":"has-default-attributes","17":"entry","18":"content-bg","19":"loop-entry"},"_links":{"self":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product\/3049","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media\/5037"}],"wp:attachment":[{"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/media?parent=3049"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_brand?post=3049"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_cat?post=3049"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.shopvalves.com\/en\/wp-json\/wp\/v2\/product_tag?post=3049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}